One of the more enduring Internet hoaxes is the chain letter claiming that the government has an e-mail tax in the works. Well, if Congress doesn't extend the Internet tax moratorium before it expires at the end of this week, the e-mail tax could soon cease to be an urban legend. The current moratorium known as the Internet Tax Freedom Act, prevents taxes on Internet access, double taxation of Web purchases and discriminatory taxes that treat online sales differently from offline sales. In effect since 1998, these bans are working just as the bill's original authors, GOP Congressman Chris Cox...